Monitor performance metrics in the OpsCenter Dashboard. Real-time and historical performance metrics are available at
different granularities: cluster-wide, per node, per table (column family), or storage tier.

From the Nodes section of OpsCenter, select different views (Ring or List) of the nodes that comprise a DataStax Enterprise
cluster and perform node management. View the status of agents, install and upgrade agents, and troubleshoot any agent
issues in the Agents view.

OpsCenter manages multiple DataStax Enterprise clusters with a single install of the central opscenterd server. Administer
your clusters using the options available from the Cluster Actions menu. Generate reports from the Help menu.

Monitor performance metrics in the OpsCenter Dashboard. Real-time and historical performance metrics are available at
different granularities: cluster-wide, per node, per table (column family), or storage tier.

Cluster metrics monitor cluster performance at a high level. Cluster metrics are aggregated across all nodes in the cluster.
OpsCenter tracks a number of cluster-wide metrics for read performance, write performance, memory, and capacity.

Pending task metrics track requests that have been received by a node but are waiting to be processed. An accumulation
of pending tasks on a node can indicate a potential bottleneck in performance and should be investigated.

Table (formerly column family) metrics allow drilling down and locating specific areas of application workloads that are
the source of performance issues. If you notice a performance trend at the OS or cluster level, viewing table metrics
can provide a more granular level of detail.

Configure alert thresholds for Cassandra cluster-wide, table, and operating system metrics in the Alerts area of OpsCenter.
This proactive monitoring feature is available for DataStax Enterprise clusters.

Organizing performance metrics presets

Clone, rename, share, or delete performance metrics views on the Dashboard. Saving
groups of graphs with named presets allows customizing, organizing, and viewing
different groups of related metrics graphs for analysis. Add metrics in performance graphs
for each preset view as you prefer.

Procedure

Click Dashboard in the left navigation pane.

At the top of the Dashboard page, hover on the preset tab and click the
drop-down arrow to open the menu.

To clone a preset view of metrics graphs:

Click Clone.

For multiple clusters, select either To This
Cluster to clone the preset view for the current
cluster, or To Different Cluster to clone the
view to a different cluster.

In the Save Preset dialog, enter a name for the preset and click
Save.

If the preset already exists in the destination cluster, a
dialog prompts you to overwrite or cancel.

If there are any issues with incompatible schema or metrics, a
warning appears. Click Continue Clone to
proceed with cloning the preset, or click
Cancel.

After the clone, rectify any issues displayed in the Error Loading
Graph panels by either editing the graph to remove the incompatible
metrics or by removing the graph entirely.

To set the default preset, click Make Default.

To rename a preset, click Rename, enter a new name and
click Save.

To delete a preset, click Delete. The original installed
default view cannot be deleted.

(Admins only) To share a preset view, click Share with all
users. A globe icon in the view tab indicates the preset view is
visible to all users.

The Share... menu option is not available if authentication is
disabled.

To view another preset, click the preset name tab at the top of the
Dashboard. Tabs appear in alphabetical order.